Detector in regularly-moving transferrer



Aug. 31 1926. 1,597,951

H. L. BLANCHARD DETECTOR IN REGULARLY MOVING TRANSFEHHER Filed Feb. a, 192e patented ug. 31, 1926;.

@METEO STATES '1,597,951 PATENT OFFICE.

HAROLD L. BLANCHARD, OE MILLBURY, MASSACHUSETTS, ASSIGNOR TO CROMETON & KNOWLES LOOM; WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

DETECTOR IN REGULARLY-MOVTNG TRANSFER/RER.

Application filed February This invention relates to improvements in the form of weft detecting mechanism located in a regularly moving` transferrer arm. Such devices usually employ a vplungernormally in non-actuating position by some form of latch and at indication of weft eX- haustion the plunger is moved to actuating position to effect a change in the replenishing mechanism when the transferrer arm rises. It is the principal object of my invention to provide a latch for the plunger so related to the latter. and the detector that accidental engagement of the latch by the detector will tend to move the latch into tighter holding engagement with the plunger. Vhen insuflicient weft is present, however, the detector will slide under the. latch and move the same to plunger releasing position. In coendingapplication Ser. No. 78,181 filed by -linne there is shown a transferrer arm having a sliding spring pressed plunger held in non-indicating position bymeans of a latch pivoted on the transferrer arm and having engagement with a notch formed in the plunger. The detecting member is mounted on a lever pivoted to the 'transferrer arm and is sodesigned as to pass under the latch at substantial exhaustion of weft, continued downward movement of the transferrer arm positively unseat-ing Vthe latch to Vrelease the plunger. ln said application the latch is pivoted in such a waythat accidental engagement of the detector member with the latch prior to substantial exhaustion tends to move the latch to unlocking position with the result that faulty rindication occasionally takes place.

n co-pending application Ser, No. 25,643 'filed by Chevrette, the plunger is held by a spring locking latch toward which the detector can move when sufficient -yarn is present,but in said application the latch is moved down by the lever which supports the detector at the time the latter moves Y under the latch, ,and said detector must therefore be so located as to be out of contact with said latch. This application, therefore,

does not lend itself to the principle set forth herein, but I do retain the latch and plunger as rst shown in-said Chevrette application.

1t is an important object of imy present invention to combine the advantage of positively unlocking the plunger as in the Hume yof mechanism not shown the transferrer arm e, i926. serial No. 86,717.

device without the uncertainty ofl its operation by reversing the Chevrette device and bringing it within the range of action of the detector.

arm sho-wing the parts associated therewith .made according to my present invention, and

with said parts as they are normally related when the transferrer arm is in raised position.

Fig 2 is a fragmentary view similar to Fig. l showing the detector in engagement with a full bobbin, Fig. 3 is a view similar to Fig.`2 but showing the detector in' engagement with a substantially exhausted bobbin but with the transferrer arm spaced slightly above the bobbin, Fig. 4 is a view similar to Fig. 1 but showing the parts in indicating position with the detector under the latch to release the plunger, and l Fig. 5

is a vertical transverse section on lline 5-5 of Fig. l.

Referring to the drawings it will be seen that I have provided a transferrer arm 10 having a foot 1l to engage the butt of the bobbin B and having an arm lQIeXtending forwardly to a pivotal mounting (not shown) for the transferrer armf By means is moved up and down as the loom operates, being given a quick downward motionl when the shuttle is thereunder andf being Vraised immediately thereafter to communicate indicating movement to the replenishing mechanism (not shown) should the bobbin give an indication for replenishment.

A `leverl has a laterally extending lug 14 positioned for engagement with a yielding pad 15, which is normally raised in the position shown Fig. 4 but which can Vbe pressed against spring action' by lug l14. The lever is pivoted to the transferrer arm as at 16 and the outer end thereof'affords pivotal support for a detector member 17 1.10

to e enter A the detector tip will.v move abouti V27 through a web 22 of of the lugJ 14 with if the detector -tip as indicated in Fig. movement thereof n will having al yarn Yengagingtip 18V which is normally displaced from vertical alignment with the pivot of the member 17. Y

'A plunger 19 having a shoulder 2O is slidably mounted in the transferrer arm 10 and has a reduced end 21 which passes said arm 10. A spring 23 is interposed between'the web 22 and the shoulder 2O Vand tends normally to move the plunger from the position shown in Fig.

VV1 tothe position shown in Fig. 4. Thereduced end`21 is provided with a notch 24 by means of which theplunger may be held against the action of -sition shown in Fig.l further provided with spring 23 in the po- 1 (and said end 21 isk a stop such as a cotvterpin 25 which engages the outer wall of theV weby 22 to limit `movement of the' plunger under` action of spring 23. The

matter thusV far describedis substantiallythe same as that-setforth in Patent No. 1,345,508 to Ryon, and the aforesaid appli cations. c

- In carrying out my improvementsI pivot the latch ,beyond and abovev the notch formed in theplunger. The latch 30 is provided with a.substantially vertical face 31 positionedffor engagementV with the detector .tip 18 and said latch is further provided with adetent ortooth 32. positioned the notch 24. The vlower portion of the latch is provided witha substantially horizontal lifting arm33 spaced'sufliciently kbelow the plunger tov permit an appreciable angular movement of saidlatch. Said latch is pivoted on a stud-34which extendsl be-k tween the walls 26 of the transferrer arm .andr` said stud isk so located'thatthe tooth 32-lies between said stud andthe detector Under normal operation the transferrer Y arm lwill move downwardly on the detect-V ing beat of the loom .to cause engagement theyielding pad 15 and .engages a vfull bobbin` 2 further downward be arrested and the yielding pad will be jdepressed. When an insufficient supply of Vweft for k continued ,weaving remains on thexbobbim-howeven its pivot andV then upon a further downward movevment of the transferrer arm-to shown in Fig. 4, where it will Vbe Yseen that the position the detector tipvhasmoved underthe vlatch 30' to movethe vsamejangularly about the i stud 34,- thusrmoving the Adetent32 from ',notch 24 to permit the spring `plimger19 I.to moveto the indicating positionV shown and ,will also be returned tothe position shown in Fig..

into tighter contact with do. not wish to be limited to the .herein disclosed,but what I claim is first to the VAposition shown`v in F ig.'\3.

l arm, aplunger slidably a latch. for the plunger vdetector and the point latch moves as a center. l

and is also on that side of the axis of the Y plunger which is opposite the liftingk arm 33. Hence, wheneverthe face 3l is engaged by the tip'the detent 32 will be moved the plunger 19 kand unlocking of the same will be prevented, but when theftip 18 is free to move yunder the horizontal arm 33of the latch,

however, the latter will be moved to release the plunger. Inasmuch as the latch is disposed entirely on one side of the pivotal support 34 gravity will tend to move ,the detent into the notch. Tension spring 35 passes through and has one end operatively attached to lever 13 while the other end is anchored to the transferrer arm asy at 36 to return the lever, to `normal position. *f

^ F rom the foregoing itwill be seen that I have provided a very simple means for releasing the plunger in detectors of the type described 'herein and that the latch is so pivoted that accidental detector tip and the latch at such times as indication of weftk exhaustion is undesirable tends only to insure amore cert-ain locking of the Vlatch and the plunger, but that as contactfbetween the 'f soon as itis proper for indication to occur"V the latch may be'moved in the opposite direction'from that in which it tends to move .when struck improperly bythe detector tip to unlock the actuating plunger. It will also'be seen that the latch moves toward details a 1. In a weft detecting mechanism for a Y loom, aV regularly reciprocating transferrer mounted in the arm,

holding engagement with having a v releasable E; the plunger, a

`pivot about which the latch moves, and a weft detector carried by rthe'transferrer arm Vand, positionedffor operative engagement with the latchto move thesame to' releasingl position'v atk substantiali'weft .exhaustion, the locking engagement between thelatch and the plunger lying between the about which, .the

plunger .Liao

ln a Weit detector for looms having a regularly reciprocating transferrer arm, a plunger slidably mounted in the arm, a latch pivotally mounted on the transf-errer arm and having locking engagement With the plunger to hold the same in inoperative position, a weft detector carried by the tiansi'errer arm and movable into engagement with the latch, engagement of the detector with the latch prior to substantial eX- haustion of the Weit tending to render more certain the locking engagement between the latch'and the plunger and engagement of the detector With the latch at substantial eX- haustion tending to move the latch to a posi tion to unlocl: the plunger.

3. In a Wett detecting mechanism for looms having a regularly reciprocating transterrer arm, a plunger slidably mounted on the transferrer arm, a latch movably mounted on the arm and having locking engagement with the plunger to hold the same in inoperative position, and a detector carried by the transferrer arm and movable into engagement with the latch, engagement of said detector with the latch atk such times as indication of Wett exhaustion is undesirable tending to move said latch to render more certain the locking engagement thereof with the plungemand engagement ofthe detector with the latch at such times as indication is desirable tending to move the latch in the opposite direction to unlock the plunger.

4. ln a Weit detecting mechanism for a loom having a transferrer arm movable to- Ward and from the Weit supply to be detected, a spring stressed actuating member inovably mounted on the transferrer arm and tending to move to operative position, a latch supported by the transferrer arm Yand engaging the actuating member to hold the same in inoperative position, and a Wett detector carried by the transferrer arm and movable at substantial weft exhaustion tov engage the latch and move the same to release the actuating member, said detector when indicating having a movement a component of which is in the direction of the latch, the portion of the latch having holding engagement With the actuating member being movable in such a direction as to have a component Which is in a direction opposite to the aforesaid component of the motion oi' the detector.

5. In a Wei't detecting mechanism Jfor a loom having a traiisferier arm movable to- Ward and from the Wett supply to be de* tected, a spring stressed actuating member inovably mounted on the traiis'ferrer arm and tending to move to operative position, a latch supported by the transferrer arm and engaging the actuating member to hold the same in inoperative position, and a Wett detector carried by the transferrer arm and movable at substantial Wett exhaustion to engage the latch and move the same to release the actuating member, said detector When indicating having a movement a component of Which is in the direction of the latch, the portion ot the latchv having holding engagement with the actuating member being movable in such a direction as to have a component Which is in a direction opposite to the aforesaid component of the motion of the detector.

6. In a weft detecting mechanism for a loom having a transferrer arm movable to- Ward and from the weft supply to be detected, a spring stressed actuating member inovably mounted on the transterrer arm and tending to move to operative position, a latch supported by the transferrer arm and engaging the actuating member to hold the same in inoperative position, and a Wett detector carried by the transferrer arm and movable at substantial weft exhaustion to engage the latch `and move the same to release the actuating member, pivotal supports for the latch and detector, said latch and detector moving in opposite directions about their respective pivotal supports When the detector moves the actuating member.

Y ln testimony whereof I have hereunto affixed my signature.

HARULD L. BLANCHARD. 

